Centering for reinforced concrete work.



PATENTEDJULY 2, 1907.

0. A. P. TURNER. GENTERING FOR REINFORCED CONCRETE WORK.

AiPPLIOATION FILED 001222, 1906.

lNVENTEIFI WITNESSES 3734 g ow U ITED -STATES,,

;- UOLAIUDEQAJP. tonnes, or MINNEAPOLIS, ninhnsdzr.i.i-f

; OENTEBING non sameness) wens;

7 matc es.

whom itgno mm;

whichthefollowifig is a full, clear, and exact descriping forming a part of this specification.

My invention relatesand it consists in providing new and improved centeringupon which to mold reinforced floor jilhb,. as will hereinafterb'e'more fully described. .f The purpose of my invention is to'provide an adjustablesheet metal mold adapted to receive semi-liquid concrete, in floor slab construction. "In centering for his work it has beenlthe custom to use boards to sup .p i't the wetgconcrete' and reinforcement, which shrinking, leave cracks between them, thus allowing waste of the liquid concrete, and through leave uneven su'rface to the underside of 21G he slab gmold thereupon. In contradistinction to such practice, I arrange sheets of corrugated metal "u ngthe supporting means, lapping the said sheets lengthwiseand sidewise, said sheetsbeing thereby adjustable totheopening between the ribs, and adapt- 25 elifliorfus e in varying-areas. These sheets I support I it til able intervals intermediate their length, genernllyr nt'a of four to four and a half feet.

lithe. gradin Figure l is a horizontal section of the g walls and a plan viewiof my false work. (the support- 0 upon which lay my -corrugated sheet metal) the posts stayg fioorbeam and joist being shown by dotted es. Fig. 2 is a detail being a section of Fig. 1, taken entire line 2 2, and Fig. 3 is another detail, Ibeing asection of Fig. 2, taken on the line 3 3.

Similar letters refer'to. similar parts, A being the:

- floorheam B the posts, G the stays, afiixed thereto, D kthe floor joists resting upon the said stays or nailed to the said E the corrugated metalsheets, laid upon the said joists, F 'the sand, filling the corrugations of 40 the shid metal sheets, and G the reinforced concrete,

f molded upon the said filling.

Through the uee of such construction I save loss through the concrete dropping through the crevices in'the wood centering, andalso save the waste incident to cutting the boards to. the required sizes.

Specification rign ttis se Applicaahion filed c l 25.18%. a a nst. 339.9%.

. :ntsni Centering for Reinforced Concrete Work, of

- ion, reierence being had to the accompanyingdraw- I resent-assess, i907.

T0 get a smooth surface to the undersi Q of my floor t k n'own that I, CLAUDE A. P. TURNER, of Minmohmfin the county of Hennepin andState of have'invented certsin nevi and useful Improve-- slab l fill the corrugat ion 's in the ngjgfksheets with ,fine sand (silicasand if obtainable) which sand I carefully level off. This sand serves toindurate the conthe process of indurating and crystalliziug of the said slab, I remove the false work (the support stays, joists and corrugated metal) which parts may be preserved for future use. The object of the said filling in the corrugation is to'give a smooth level suriace to the bottom of the slab to save the usual waste of concrete through joints in common board centering, to take up excess water inconcrete and give it back to the concrete as it is needed to produce perfect crystallization. thereby making the concrete stronger and better adapted to withstand the heat or to render it fireproof,

What-I claim as new and desireto secure by Letters Patent is:

1. A support for concrete work, consisting of horizontally adjustable sheets or corrugated metal, und a filling in the corrugations.

2. A gport for concrete work, consisting of horizoutally overlapping sheets of corrugated metal, and a filling 6. In a support for concrete work, the combination of joists, sheets of corrugated .metal horizontally adjustable and resting upon and supported by said joists, said sheets of metal being corrugated, and send filling the corrugations of the metal sheets.

7. A, support forconcrete work, consisting of overlapping sheets of corrugated metal, said sheets being horizontally adjustable both mitujinally and transversely.

' CLAUDE A. P. TURNER.

- Witnesses H. H. PETERSON, D. B. Fnsnns. 

